physics : blow sheets of paper with wind?
It depends in how many sheets you'll have in your scene, and what type of animation you want to do.

If it's a realistic animation, then I'll prefer physics and work on my simulation enough to bake it (it wont be that heavy then)

If it's a cartoonish animation with few sheets, then the curve method could be fun, but it's not the fast option here.

Curious to see what others think about it !